Button Lock is a mouse utility introduced in PowerToys 0.102, Microsoft’s toolkit for adding productivity features to Windows. The available description identifies it as a mouse utility but does not specify which buttons it affects or how its controls work, so its exact behavior should not be assumed.
Mouse utilities can change how users interact with a desktop, making clear status indicators and an easy way to reverse a setting important for both usability and security. In general, attackers may exploit confusing input settings or trick users into changing them, while defenders can reduce risk by using trusted software, reviewing its settings, and checking that input behavior is expected. Button Lock’s inclusion in PowerToys is a feature release, not evidence of a security incident.